CVE-2025-2848Network attack vector

Authenticated settings manipulation via missing authorization

Published Dec 4, 2025 · Updated Dec 4, 2025

Missing authorization in Synology Mail Server allows remote authenticated users to alter settings and disable non-critical functions. Synology has not disclosed the affected endpoint or the authorization check omitted when requests read or modify settings and functions. A valid account is required; affected releases are before 1.7.6-10676 on DSM 7.1 and before 1.7.6-20676 on DSM 7.2.

CVSS severity6.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Synology Mail Server allows remote authenticated users to alter settings and disable non-critical functions. Synology has not disclosed the affected endpoint or the authorization check omitted when requests read or modify settings and functions. A valid account is required; affected releases are before 1.7.6-10676 on DSM 7.1 and before 1.7.6-20676 on DSM 7.2.

The record

CVE
CVE-2025-2848
Published
Dec 4, 2025
Updated
Dec 4, 2025
Vendor
Synology
Product
Synology Mail Server
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <1.7.6-10676
  2. Affected versionversion=* <1.7.6-20676

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Synology · Synology Mail Serverversion=* <1.7.6-10676; version=* <1.7.6-20676

Published CVSS scores

6.3Synology Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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